I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
bearable barrable bearably barbule brabble barbal burble burbly barbel
arable errable hearable barrable bearable pourable hirable wirable sharable durable parable wearable curable tearable terrible garble barbule drably brabble triable fireable hyperbole durably burble grabble curably rabble variable roble bearably verbile hireable warble horrible drabble marble friable treble ruble shareable